Electric hand-lamp.



7- 'PATENTED AUG. 1, 1905. H. F. STAKELBECK.

ELECTRIC HAND LAMP. APPLICATION rum) 11120.16, 1904.

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UNITED STATES PATENT @FFICE.

ELECTRIC HAN D-LAIVI P- Specification of Letters Patent.

Patented Aug. 1, 1905.

Application filel December 16,1904. Serial No. 237,056.

To all whom it may concern:

Be it known that I, HERMAN FREDERICK STAKELBEOK, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Electric Hand-Lamps, of which the following is a specification.

My invention relates to improvements in electric drop or hand lamps, and more particularly to an improved means for securing the electric wires to the handle.

- In the accompanying drawings, forming art of this specification, and in which similar etters of reference indicate similar parts throughout the several views, Figure 1 is a central longitudinal sectional elevation through an electric hand-lamp embodying my invention; and Figs 2, 3, and 4, a top view, a side elevation, and an inside view, respectively, of the means for insulatin and securing the electric wires to the handIe.

a is the handle of the lamp, which is, as usual, furnished with a longitudinal perforation b. c is an exteriorly-threaded ferrule carried upon the upper end of handle a. d is a base screwed upon ferrule c; e, a socket carried by base d;f, a lamp; 9 h, the electric Wires, which pass through handle a. and which are attached to binding-posts carried by socket e in the usual manner. All of these parts are well known and will not need detailed description.

In lamps of this kind it has heretofore been the usual practice to secure the wires 9 h to the handle a by simply tying va knot in them before securing their ends to the bindingposts, the knot lying within the base (i and bearing against the top of the ferrule c in order to prevent the wires from being drawn out of the handle. This arrangement has been found to be not only insecure, but unsafe, in that the insulation ofthe wires is shortly chafed through, causing a short circuit, with consequent danger of fire.

In carrying out my invention I make use of a two-part plug 0;, constructed of some insulating materialfiber, for instancethe opposite faces of the inner sides of the plug being furnished with longitudinal grooves 7' for the Wires 9 h and the outer sides of the plug being tapered, as shown. Preferably the plug is furnished with a rim ]c at its top, and the grooves are corrugated or roughened so as to more firmly grasp the wires.

To attach my insulation to the handle, the wires are first passed through the hole in the latter, and the two-part plug is then placed against opposite sides of the wires, the grooves of'the plug, which are of somewhat less diameter than the diameter of the wires, engaging the wires. By holding the plug against the wires and by drawing the latter downward the plug i is drawn down into the ferrule c, the tapered sides of the plug entering the top of the ferrule and being held therein by friction. At the. same time the two parts of the plug are pushed together and tightly bind against the wires 9 71/. The rim It prevents the plug being drawn too far into the upper end of the opening I).

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In an electric hand-lamp, in combination, a lamp, wires leading to the terminals of said lamp, a handle, a tapered ferrule carried by said handle, and a two-part plug of insulating material furnished upon its inte rior with two grooves to receive each one of the wires leading to the lamp-terminals, and being tapered upon its outer sides to enter said ferrule.

2. The combination with the perforated handle, the wires and the lamp of-an electric hand-lamp, of a ferrule carried by said handle and a two-part plug of insulating material, the outer sides of said plug being tapered and being adapted to be drawn into said ferrule and the inner sides of said plug being furnished with two roughened opposed grooves adapted to bind each against one of the wires.

HERMAN F. STAKELBEGK.

Witnesses:

GEORGE W. SELTZER, CHARLES A. BUTTER. 

